Originally Posted by OTRtech
If these "things" are so great , Why aren't aircraft covered with them ?
That should give one a clue as to how well they perform .
airplanes usually have something like that on their wings. look at a 747 or most other modern large jets. they usually have upturned wings at the end, and sometimes just flat lines on top of the wings. these help prevent vortices, so theres less drag on the wing and air flows smoother.
seems like the opposite idea on these trucks...